/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_EVENT_GMSSL_H_INCLUDED_
#define _NGX_EVENT_GMSSL_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>

#include <gmssl/tls.h>
#include <gmssl/error.h>
#include <gmssl/rand.h>
#include <gmssl/x509.h>
#include <gmssl/version.h>


#define NGX_SSL_NAME     "GmSSLv3"


#define GMSSL_VERSION_TEXT GMSSL_VERSION_STR

#define ngx_ssl_version()       gmssl_version_str()


#define ngx_ssl_session_t       int // 这个可能需要一个 我们现在可能不支持SESSION 了
#define ngx_ssl_conn_t          TLS_CONNECT   // 这个应该是 TLS_CONNECT



//typedef struct ngx_ssl_ocsp_s  ngx_ssl_ocsp_t;


struct ngx_ssl_s {
    void                       *ctx;
    char                       *certfile;
    char                       *keyfile;
    char                       *password;
    ngx_log_t                  *log;
    size_t                      buffer_size;
};


struct ngx_ssl_connection_s {
    ngx_ssl_t                   ssl_ctx;
    ngx_ssl_conn_t             *connection; // TLS_CONNECT 实际上没有必要malloc

    ngx_int_t                   last;
    ngx_buf_t                  *buf;
    size_t                      buffer_size;

    ngx_connection_handler_pt   handler;

    ngx_ssl_session_t          *session;
    ngx_connection_handler_pt   save_session;

    ngx_event_handler_pt        saved_read_handler;
    ngx_event_handler_pt        saved_write_handler;

    u_char                      early_buf;

    unsigned                    handshaked:1;
    unsigned                    handshake_rejected:1;
    unsigned                    renegotiation:1;
    unsigned                    buffer:1;
    unsigned                    no_wait_shutdown:1;
    unsigned                    no_send_shutdown:1;
    unsigned                    handshake_buffer_set:1;
    unsigned                    try_early_data:1;
    unsigned                    in_early:1;
    unsigned                    in_ocsp:1;
    unsigned                    early_preread:1;
    unsigned                    write_blocked:1;
};


#define NGX_SSL_NO_SCACHE            -2
#define NGX_SSL_NONE_SCACHE          -3
#define NGX_SSL_NO_BUILTIN_SCACHE    -4
#define NGX_SSL_DFLT_BUILTIN_SCACHE  -5


#define NGX_SSL_MAX_SESSION_SIZE  4096

typedef struct ngx_ssl_sess_id_s  ngx_ssl_sess_id_t;

struct ngx_ssl_sess_id_s {
    ngx_rbtree_node_t           node;
    u_char                     *id;
    size_t                      len;
    u_char                     *session;
    ngx_queue_t                 queue;
    time_t                      expire;
#if (NGX_PTR_SIZE == 8)
    void                       *stub;
    u_char                      sess_id[32];
#endif
};


typedef struct {
    ngx_rbtree_t                session_rbtree;
    ngx_rbtree_node_t           sentinel;
    ngx_queue_t                 expire_queue;
} ngx_ssl_session_cache_t;



#define NGX_SSL_SSLv2    0x0002
#define NGX_SSL_SSLv3    0x0004
#define NGX_SSL_TLSv1    0x0008
#define NGX_SSL_TLSv1_1  0x0010
#define NGX_SSL_TLSv1_2  0x0020
#define NGX_SSL_TLSv1_3  0x0040


#define NGX_SSL_BUFFER   1
#define NGX_SSL_CLIENT   2

#define NGX_SSL_BUFSIZE  16384


ngx_int_t ngx_ssl_init(ngx_log_t *log);
ngx_int_t ngx_ssl_create(ngx_ssl_t *ssl, ngx_uint_t protocols, void *data);

ngx_int_t ngx_ssl_certificates(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_array_t *certs, ngx_array_t *keys, ngx_array_t *passwords);
ngx_int_t ngx_ssl_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert, ngx_str_t *key, ngx_array_t *passwords);
ngx_int_t ngx_ssl_connection_certificate(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *cert, ngx_str_t *key, ngx_array_t *passwords);

ngx_int_t ngx_ssl_ciphers(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *ciphers, ngx_uint_t prefer_server_ciphers);
ngx_int_t ngx_ssl_client_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert, ngx_int_t depth);
ngx_int_t ngx_ssl_trusted_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert, ngx_int_t depth);
ngx_int_t ngx_ssl_crl(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *crl);
ngx_int_t ngx_ssl_stapling(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *file, ngx_str_t *responder, ngx_uint_t verify);
ngx_int_t ngx_ssl_stapling_resolver(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_resolver_t *resolver, ngx_msec_t resolver_timeout);
ngx_int_t ngx_ssl_ocsp(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *responder, ngx_uint_t depth, ngx_shm_zone_t *shm_zone);
ngx_int_t ngx_ssl_ocsp_resolver(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_resolver_t *resolver, ngx_msec_t resolver_timeout);
ngx_int_t ngx_ssl_ocsp_validate(ngx_connection_t *c);
ngx_int_t ngx_ssl_ocsp_get_status(ngx_connection_t *c, const char **s);
void ngx_ssl_ocsp_cleanup(ngx_connection_t *c);
ngx_int_t ngx_ssl_ocsp_cache_init(ngx_shm_zone_t *shm_zone, void *data);
ngx_array_t *ngx_ssl_read_password_file(ngx_conf_t *cf, ngx_str_t *file);
ngx_array_t *ngx_ssl_preserve_passwords(ngx_conf_t *cf, ngx_array_t *passwords);
ngx_int_t ngx_ssl_dhparam(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *file);
ngx_int_t ngx_ssl_ecdh_curve(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *name);
ngx_int_t ngx_ssl_early_data(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_uint_t enable);
ngx_int_t ngx_ssl_conf_commands(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_array_t *commands);

ngx_int_t ngx_ssl_client_session_cache(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_uint_t enable);
ngx_int_t ngx_ssl_session_cache(ngx_ssl_t *ssl, ngx_str_t *sess_ctx, ngx_array_t *certificates, ssize_t builtin_session_cache, ngx_shm_zone_t *shm_zone, time_t timeout);
ngx_int_t ngx_ssl_session_ticket_keys(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_array_t *paths);
ngx_int_t ngx_ssl_session_cache_init(ngx_shm_zone_t *shm_zone, void *data);

ngx_int_t ngx_ssl_create_connection(ngx_ssl_t *ssl, ngx_connection_t *c, ngx_uint_t flags);

void ngx_ssl_remove_cached_session(ngx_ssl_t *ssl, ngx_ssl_session_t *sess);

ngx_int_t ngx_ssl_set_session(ngx_connection_t *c, ngx_ssl_session_t *session);
ngx_ssl_session_t *ngx_ssl_get_session(ngx_connection_t *c);
ngx_ssl_session_t *ngx_ssl_get0_session(ngx_connection_t *c);

void ngx_ssl_free_session(ngx_ssl_session_t *sess);
ngx_connection_t *ngx_ssl_get_connection(ngx_ssl_conn_t *c);

/*
#define ngx_ssl_verify_error_optional(n)                                      \
    (n == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT                              \
     || n == X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN                             \
     || n == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY                     \
     || n == X509_V_ERR_CERT_UNTRUSTED                                        \
     || n == X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE)
*/
ngx_int_t ngx_ssl_verify_error_optional(long n);

ngx_int_t ngx_ssl_check_host(ngx_connection_t *c, ngx_str_t *name);


ngx_int_t ngx_ssl_get_protocol(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_cipher_name(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_ciphers(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_curves(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_session_id(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_session_reused(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_early_data(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_server_name(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_raw_certificate(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_certificate(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_escaped_certificate(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_subject_dn(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_issuer_dn(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_subject_dn_legacy(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_issuer_dn_legacy(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_serial_number(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_fingerprint(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_client_verify(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_client_v_start(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_client_v_end(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);
ngx_int_t ngx_ssl_get_client_v_remain(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s);


ngx_int_t ngx_ssl_handshake(ngx_connection_t *c);
ssize_t ngx_ssl_recv(ngx_connection_t *c, u_char *buf, size_t size);
ssize_t ngx_ssl_write(ngx_connection_t *c, u_char *data, size_t size);
ssize_t ngx_ssl_recv_chain(ngx_connection_t *c, ngx_chain_t *cl, off_t limit);
ngx_chain_t *ngx_ssl_send_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit);
void ngx_ssl_free_buffer(ngx_connection_t *c);
ngx_int_t ngx_ssl_shutdown(ngx_connection_t *c);
void ngx_cdecl ngx_ssl_error(ngx_uint_t level, ngx_log_t *log, ngx_err_t err, char *fmt, ...);
void ngx_ssl_cleanup_ctx(void *data);



#endif /* _NGX_EVENT_GMSSL_H_INCLUDED_ */
